Carbureter.



J. HARRIS, CARBURETER. APPLICATION FILED MAY 9, 1908.

M555: [Ya/5222272:

Patented M21117, 1911.

JOHN HARRIS, OF CLEVELAND, OHIO.

Y CARBURETER.

Specification of Letters Patent.

Patented Mar.- 7, .1911.

Application filed. May e, 1908. Serial at, 431,774.

To all whom it may concern:

Be it known that I, Jor-nv HARRrs, aciti- ,zen' of the United States, residing at Cleveland, in the county of Cuyahoga and State have invented a certain new and.

of Ohio,

'useful Improvement in Carbureters, of

which the -following is at full, clear, and exact diiscription, reference being had to the accompanying drawings.

This inventionielates generally to devices for producing a mixture of air with fluid fuel and more especially to devices, in

the nature "of-: carbureters, for producing mixtures of air with liquid fuel in'vaporous condition. 1

It has for its general objects to simplify the construction of such devices; to provide a construction whereby the proportions of the air and the other fuel element will be maintained constant for all ranges of open- 'ngs of the fuel and air ports; to provide a construction whereby the flooding of the apparatus will be prevented; also to prov: le

a construction of mixing device which is ad'a table for both gaseous and-liquid fuels.

ore limitedly, the invention consists n certain details of construction which are illustrated in the drawings hereto annexed, :wherein- Figure 1 represents a vertical sectional view taken through a carburetor constructed in accordance with my invention, a part ofthe engine connectionbeing shown in elevation; Fig. 2 represents a sectional view corresponding to line 22 of Fig. 1; and

Fig. 3 represents a similar view corre sponding to line 3-3 of Fig. 1. I

Describing the parts by reference, char acters, 1 denotes a; casing forming a chamber wherein the fuel elements are mingled, This chamber is closed at its upper end, except for a central bore which receives a valve stem, and is provided with an upwardly extending connection 2 to which the engine suction pipe may be attached. At its lower end, casing 1 is provided with an internal thread forsure 3. This bottom closure is providedwith an external thread by means of which it is fitted to thebottom of the casing 1 andwith a flange e'adaptcd to abut agamstT the-bot- .is provided with a threaded-connection 5 by may be co npledtto 3, inc

rojecting inverted" frustoeoonielt we the; reception of a bottom clomeans of which it a P YPl-W- 16 sure 3 has termed therewit an upwardly.

6, the washer a i forming a valve a similarly shaped valve 7. This valve is of the plug type and is provided with a stem 8 which extends upwardly through the top ot-casing 1 and carries at its upper end a chamber adapted to receive:

receptacle 9, which may be threaded onto the 1 upper end of'said valve stein.- This recepe tacle is provided witha removable cover 10 and has therein a float llprovided with a stem 12 which-extends through the longi tudinal bore 13 of-saidplug and c'arries'oat itslower end a conical valve .14; adapted to seat against a frustoronical seat at the lower end of bore 13. A chamber -151is, pros.

vided between the lower end of the valveplug. 7 and the bottom,-of theQohamber formed within the 'wall or, casing .6 to ac-i commodate the movement ofthepvalve 1 1,

and connection 5 .is provided-with a bore 16 communicating with such chamber.

from the bore 13 to a fiared outlet port 18 at the periphery of-saidplug. -Thetransverse bore 17 is ofthesame capacity, ashore 13. The outlet port 18 is flared-horizontally and is of the same depth:as thediameterof bore 17, for, a purpose to ,be hereinafter described. J

\Vithin the casing lgthere' mounted a cylindrical] valve;-19. having acircumferential elongated Sport Q20 in ,the

vertical wall thereof. lhisportis adapted to register with a corresponding jport 21in the casing 1 located beneath tlie connection i. For the purpose of rotating the valve 19, I mount upon the valve stem 8 ,a finger 22, said finger projecting downwardly.;and outwardly and fittin 7 within. a slot 23 'fbrnij l in the wall 0 valve :19 preferably diametrically opposite the port 20. I:his fingeris provided with 'a central ring 2 1 adapted to fit overthe valve stenrs and is clamped in place on said stem by means of ing the ring portion of the finger between itself and the upper surfaceof plug 7. 2B denotes a cuprshaped washer which is alsp threaded on the" valve 1 stem above the nu-t 25, and 27 denotes aninverted cup-,sha d washer the up er surface whereofljis a; pered or conica to form a bearing against the top of the casing which will allow the valve plug ,Ito turn easily, w ithoutf binding. Between these any washers there is} ntejrg posed a spinalgsprihg 28, This sprin holds contact Witl t e 17 denotes a transverse bore extending.

is; irtutfati a nut 25 threaded onto said stem and clamp per surifaceiof the casingl and la'rg'ely prevents a y leakage of the mixture at this;- point.

The pressure'of thespring against. the washer 26 holds the valve plug to its seat within the wall 6'. It will' be noted that a full taper is given to the valve plug "and its surrounding casing. v the binding of'the and the leakageof This prevents plugwithin the casing uel through the valve. The wall or easing 6 is -provided with an elongated slot2 9 which is'located diametrifcally opposite the port21 in casing 1.

Pin

The slot 29 is narrow, varying from 60' to.

80 thousandths of an inch, according to the Capacity of the engine'with'whichthe carbureter. may be employed. It is flaredoutthe inner-st r ,length of the outer flared ,wardlyat op osite ends and its'len th' at f c e of easin 6is equal tothe end of port- 18.

Its "full capacity will be no greater than thatof bores and 17 'to'maintain said slot under the constant "pressure of the head 1 produced by the receptacle'9,' and its angular extent will be equal to that-ofports 20'and 2-1. The widthlof f portioned to the width of ports 20, 21-as to The bottom plate or closure secure the fluid fuelto produce the desired mixture thereof. By the construction described, this proportion will be maintained for all positions ofthe air and fuel valves;

3 is procommunivided withan aperture which cates with a groove 32 in the upyr surface "of the closure and providesa discharge out- 'let' for any'liquid fuel that may tend to. collect in the mixing chamber,

thereby preventing the flooding of such chamber.

' Above casing..1,'valveste1n S is provided with anoperating handle 31 detachably connected theretovalve stem may be rotated and the supply I of air and fuel varied as desired.

Totthe threaded supply pipe 5 is coupledthe fuel supply pipe (not shown) through which fuel is fed to the carbureter'. The

float 11 acts to maintain a of this fuel valve 14 to its seat whenever the prede termined height of the liquid in the float chamber is exceeded. In normal operation,

constant pressure the valve let is never'entirelyseated but is I the extent held by the float 11 at just the distance i 4 from the seat which will maintain a constant-" feed tothe carbureter and a constant level in the float chamber.

By the. construction illustrated and de-.-

scribed, I have provided means whereby a definite proportion between the fluid fuel and air .may. be maintained irrespective of" v of openingwifthe'fuel and'air Y valvesr This definite proportion results not only from itheprovision of air and fuel ports which are "opened.'.andl closed simulttaneouslylin the same proportions but-from slot 29 is so pro-' proper proportions of air and by means ofwhich the at the port 1S'-by drawing the the fact that the pressure of the, fluid fuel constancy is secured by the provision'of the flaring maintained by the float chamber 9. This constant proportion between the air and fuel ports dispenses with the necessity for manipulatinganadditional fuel valve to It also dispenses with the use of a setting as a propermixtu're will always be obtained, no matter what may be the extent of opening of the -valves. A It will be notedethat the air port 21 in the casing is located beneath the engine connection 2. -This connection.is ordinarily bolted directly to the down-turned inlet the port 21 into close proximity with the sion to the mixing chamber. .Alsog'in the charge which is remote from the fuel port 29, thereby preventing impoverishing the mixture by carrying off said port.

different capacities ofengines.

I claim:

gated inlet port for air, a ro ary valvefor saldcasmg having an elongated port corhaving an angular extent substantially valve co-acting therewith and havlng a port adapted to discharge through saidslot, and

taneously.

casing having an elongatedair' inlet port in the wall thereof and-also having a mixsaid casing and havin corresponding to the ormer 1 port, a. fluid fuel valve comprising a'casingwithin the former casing and having an elongated slot extent as'that of'theair inlet p0rt, a rotary valve within the latter casing and having "on the discharge slot '29 is constant. This.

enrich the mixture whenlclimbing a hill.

cylinder wall and causing the air to, be warmed by the eng ne prior to 'lts admis- The mixing-device herein described and varied to accommodate different fuels, both gaseous and liquid, as well as equal '.t.o that of the air inlet port, a rotary' port 18 and bythe constant head.-

point for the valves in starting the engine,

valve of the'engine cylinder thus bringing case of back-fire it provides a free dissuch discharge from the liquid fuelthat may be in and around q '1. In acarburet'er, the combination of a casing having a m1xture outlet and anelonresponding to the'jport insaid casing,-a fluid fuel valve. caslng havlng an elongated slot c'onnectionsfor operating said valve simul j 2. In a carbureter, the combination of-a tureout-let, a' rotary valve mounted within an elongated'port in'its wall ofsubstantially the same angular a port adapted to register with the elongated slot in said casing, means for rotating said latter valve, and a connection between said valves for rotating the same in unison.

3. In a carbureter, the combinationof a chamber having an elongated air inlet port in the wall thereof and also a mixture outlet, a valve rotatably-Inounted-within said charnber'a'nd having elongated port adapted 1o toregisterwith'the formerport, a fluid fuel valvelocatedwitliin saidchamber and having an elongated-discharge slot of substantially the same. I

let port, and an operating finger carried by the fluid fuel valve and engaging the air valve.

4. In a carbureter, the combination of a casing having an elongated air inlet port in the wall thereof also a mixture outlet,

2 0 """otaryva lve nioiinted within said casing faifdlnivingamort.adapted to register with, tlieformer"port-and' having a slot in t e upper edge thereof, a'fluid fuel valve within said casing and concentric with said first mentioned valve and comprising a rotary plug, and a finger carried by said plug and projecting into the slot in the upper edge of the air valve.

5. In a carbureter, the combination of acasing having an a1r i-n1et port in the "wrill 'thereef and 'a ;mixture outlet, a valve ia'ssociatedrwi said "casing and having a portaadapte o register with the former port,- an 'eiid closure for said casing having ,a frusto-conlcal valve seat projecting into" said casing and a fluid fuel connection communicating with said seat, said seat being provided with a discharge orifice in the wall thereof,a rotary plug mounted in said seat 40' and having a longitudinal portadapted to communicate with. theinterior of said seat iaiid aflateralrport adapted to register with nthelateral'port'in 'said seat, and means for rotating said; valves ineunison. .f-r'il'n a carburet er, the combination ofa casing having an air inlet port in the Wall thereof and a mixture outlet, a rotary valve mounted within said casing and having apert adapted to register with the [former port, an end closure for said casing having a fuel supply connection and provided with a central frusto-conical valve -;S9 ti;having;.=a1r elongated slot in the wall thereof},-ja rotary plug gmounted within said seatgapdhaving. alongitudinal port adapted to communicate with the fuel ,-s upply connection and having a lateral port extending from the longitudinal port andi adapted to register "with said slot, and connections for '60 rotating said plug and the first mentioned 7 valve in mison. 7. In a caroureter, the combination of a casing ha a an elongated air inletv port therein, a d a mixture outiet therefrom, a valve flQK;.-,.-i(i within said casing; and havangular extent as the air iningan elongated port adapted to register with the former port, an end closure for said casing having an inwardly projecting frusto-conical valve seat provided in its wall with an elongated slot, a frusto-eonical valve mounted within said seat and having a longitudinal bore and a lateral port extending therefrom provided with an elongated dis-. charge orifice adapted to-register with said slot, means for supplying fluid fuel to the latter valve and means-.foiz'rotating the valves in unison,

8. In a carbureter the combination of a casing having it an elon ated air inlet port in the wall thereof and also having a mixture out-let, arr adjustable'rotary valve 00- operating with said casing and having an elonga te port adapted to register with the fornfer 'ort, and a fluid fuel valve adapted to discharge into said casing, said valve comprising a valve casing having an elongated slot in the wall thereof and a rotary valve mounted in saidcasing and having a port providedwitha flared orifice adapt;- ed to register with said slot, and means or rotating the two valves in unison; I

9. In ,a carbureter,,thecombination of a casing having a mixture outlet, means forregulating the supply of air to said casing, a valve for supplying liquid fuel to said casing, said valve comprising a plug having a stern projecting through and above said casing, a float feed chamber carried ,by said stem, said stem and said valve having a pas-' sageway therethrough, a, valve carried by said stem andyadapted to seat at the lower end of the valve plug, said plug being providedwith a lateral discharge port, and a valve casing cooperatingwith said'plug and havin a discharge outlet with which said latera port may register.

10. In a carbureter, the combination of a casing having a mixture outlet, means for admit-ting air to said casing, a closure for thebottom of said casing provided with an inlet for liquid fuel and having a valve casing projectinginto the former casing, the latter. casing being provided with a. discharge port in the wall thereof, a rotary valve mounted in thelatter casing andhaving an operating stem projecting through the top of the formercasing, there being a longitudinal bore through said valve and stem, a floatfeed chamber carried by the upwardly projecting portion of said valve stem, a floatimsaid chamber, a valve-stem carried bysaidiloat and projecting through the borofatheflfirst mentioned valve and stem, avalve on the stem, carried by the float, said first-mentioned valve being provided with ialateral port adaptedto communicate with the port in its seat.

11. In a carburcter, the combination of a casing having a mixture outlet, means for admitting airi n said casing, a liquid fuel v ing into a bore in the former valve stem, a

valve casing in the former casing, the latter casing being provided with a discharge port, a rotary valve mounted in the latter casing and having an operating stem projecting upwardly therefrom, a float feed chamber carried by the upwardly-projecting portion a float in said chamber,

of said valve stem, a valve-stem carried by the float and project- 'valve on the second valve stem, said firstment oned valve being provided with a lateral' port adapted to communicate with the bore in its stem and with the port in its seat.

12. In a carbureter, the combination of a casing having an air inlet port in the side wall thereof, and also having a mixture outlet, a valve having a port cooperating'with the first mentioned port, a fluid fuel supply connection con'ipris ng a valve casing pro- JQCtlDg into the former casing, a rotary valve I within the latter casing and having a stem projectingthrough the former casing, an operating finger carried-by the valve stem and engaging'the fo-rmer'valve, means for locking said linger in place, a tapered washer mounted on said valve stem and bearing against said casing, and a spring engaging said washer and operating to seat said fuel supply valve.

13. In a carburetor, the combination of a casing having anair inlet port in the side wall thereof, and also having amixture out-- let, a valve havii'ig a port cooperating with 'the firstmentioned port, -a fluid fuel supply connection comprising a valve casing projecting into the former easing, a rotary valve within the latter casing and having a stem l'irojmtting through the former casing, an operating finger carried by the valve stem and engaging the former valve, means for. cup shapedsaid casing and having an elongated portadapted to register with the former port, a fluid fuel connection carried by said casing,

a valve seat projecting into said casing and communicating with said connection and having a port in the wall thereof, a rotary plug within said valve'casing and having alateral port'adapted to communicate with the port in the wall of said valve casing, a

Copies of this patent may be obtained for fingercarried by said valve and operatively connected with the first-mentioned valve,

means for clamping said finger in position, a pair of Washers mounted on said stein, one ofvsaidwashers being provided with a tapered surface adapted to engagei'he surface on the first-mentioned casing, and a spring interposed between said washers. I

15. In a carbureter, the combination of a casing having an air inlet port and ainixture outlet, a valve controlling said port, a closure for the lhttoni of said casing having an annular trough in the surface thereof within the casing-and a drain port extending through said closure and communicating with said trough, a valve casing above said closure having an opening for the adinission of the fluid fuel, a valve Within said valve casing controlling the opening in the operating said casing, and connections for valves in unison.

l6. A carbureter comprising in combination a casing having an air inlet portand a mixture outlet, a rotatableair valve fitting within said casing and having a port adapted to'be-brought into register with the cats ng port, a fuel'valve arranged centrally within said casing, said fuel valve comprising a fixed member and a rotatable member,

one of said members having an elongated slotof substantially the same angular extent as the air inlet port and the other ofsaid members, having a port adapted to cooperate therewith, and means for operating said valves simultaneously.

17. In a carbureter, the combination of a casing having a mixture outlet and an e10ngated air inlet port, a rotary valve for said' casing having an elongated port correspond- "ing to the portin said casing,- a fluid fuel valve comprising a fixed member having an elongated slot and a rotatable member hav ing an elongated slot adapted to be brought into register with the'slot in the fixed member, the angular extent of the opening through the registering slots in 'said fuel valve member being substantially the. same as tlieangula r extent of the registering portions'of said ports, erating said valves simultaneously.-

In testimony whereof, I hereunto-afiix mysignature in the presence of two witnesses.

VVit nessesr J'.'S. HARGER, v Ones. LINDSAY.

and connections for op I JOHN HARRIS. I 

